I'd say fifteen, maybe fourteen.
How old do you think she was at the time of the Epilogue?
I imagined her with dark red hair and blue eyes. I bet she'd be a beater on the Quidditch team!
What would she look like? Would she be more Weasley-ish or look more like her mother?
I honestly think she'd act like Tonks for some reason....
What do you think she's like, personality-wise?
Gryffindor...I can't see a Weasley or a Potter being anywhere else....
What house would she be in?
Sister--I'd say she goes to her for advice and looks up to her, but they aren't very close...
Do you think she'd get along well with her sister? Her brother? Her parents? How about the rest of her family, and the students/teachers at Hogwarts?
Brother--I'd say she'd be protective of him, and make sure he doesn't get bullied.
Students--I'd wager that she was popular...
Teachers--I'd say she'd like a few of the teachers, but not all.